DC and Tone

[Don]

Hi all,

I have a client who is lucky enough to have to Kawai GS60 (6'9") with
consecutive serial numbers. Both are equipped with full DC systems (i.e.
three drier bars per instrument). The controllers were fighting each other
so I disconnected one controller and ran the system from one piano to the other.

This winter the *second* piano some how became unplugged (while the owner
was busy having a heart attack). The tone color of the unplugged humidifier
instrument was much *thinner*. I plugged it in and the tone has returned to
where it was before.


At 11:00 AM 3/7/98 -0700, you wrote:
>
>Just recently (a week ago) I installed a "wet" humidistat which centers
>humiditiy at 48% RH instead of the usual 42%. My customer who has an
>unusually fine Yamaha CF about 20 years old but rebuilt is always looking
>for more power and carrying power. To our amazement the piano went out 
>of tune but the carrying power increased another major amount. My customer
>had suspected that the tone got better when we had rainy seasons. I think
>I'm convinced now. The customer momentarily is ecstatic.
>
>What do some others of you think who have experienced this kind of change?
>
>My present thinking is that the board has pushed up a little stronger
>against the strings and that the impedance between strings and board has
>changed enough so that there is more resistance of the board to the 
>energy of the string's downward pressure and that this causes the duration
>to increase, but I can't understand the greater power also.
>
>Jim Coleman, Sr.
>
>
Regards,
Don Rose, B.Mus., A.M.U.S., A.MUS., R.M.T., R.P.T.
"Tuner for the Centre of the Arts"
drose@dlcwest.com
3004 Grant Rd.
REGINA, SK
S4S 5G7
306-352-3620 or 1-888-29t-uner